Valve gear



Aug. 28, 1923.

C. J. PlLLloD VALVE GEAR Filed Feb. 26 1921 INE/ENTER Patented Aug. 28, i923.

.i entre stars CHARLESYJ. rumen, orromnoj orare, assrenoe 'ro namensnaennsgrausrnn;

,lvALvE' GEAR Y Application led February 26, '1921; jSeral No. 4478,142. i'

To alwzom z'tmag/ concern.' Be it known that I, CHARLES- J. PILLIoD, a citizen of the United States, anda resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Valve Gear; and l do hereby declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it apper'tains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification. v L

I This invention relates to valve gears and particularly to those of the link type ofreverse for use on locomotives.

K In a former application filed February io, 1921, serial No. 443,743, I have shown a link form of reverse gear of the Walscheart type changed to conform toVv my -invention.` The present inventionl shows a different form of reverse gearof the link type and its object is to provide such a gear with the features of myinvention and also to provide a simple and compact Aform of valve gear `of the link type of cross-head driven and capable of use in certain connections where other types ofv gears could not be conveniently employed.

The invention is fully Ydescribed in the following specification, andY whiley in its broader aspect'it-is capableof embodiment in numerous forms, a' preferred embodiment thereof is illustrated 'in the accompanying drawings, in which,

Figure 1 is a fragmentary side elevation of a locomotive equipped with Vmy improved valve gear. Fig. QJ is a Vfragmentary top plan view of one side portion thereof. Fig. 3 is a central vertical section through the links and cross-shafts of the valve gears.

Fig. 4i is a cross-section ofthe reverse link taken along the center line of the radius rod,'with parts of the latter in full,l and Figs. 5, 6, 7 and 8 are different views of two of the members forming the reverse link.

Referring to the drawings, 1 designates a locomotive frame, 2 the locomotive drive wheels, 3 an engine, one of which is located at each side of the locomotive, 4a crosshead operated by the piston of each engine, and 5 the engine valve-stem cross-head guide.

The reversing mechanisms for the valve reverse which isV Vlgears one Vof'which islocatedat each sidev'olfV the locomotive,rhave .twoYshaft/S, 6 Yand 7,

telescoped one'withn theother and extend ing crossLwise ofthe locomotive with their ends suitably journaled lin `side brackets 8 of Vthe locomotiveV frame. The outer or sleeve;shaft 6 carries, in` the present instance, at the -right'side of the` locomotive a downwardly extending radius-arm 9, and at the other side ofthe'locomotive a reverse-- link 10 .forprocking movements therewithg The cross-shaft 7 carries a downwardly eXT Vtending radius-arm 11 Aat therleftsideof the 'locomotive and a reverse-link l2jat the right side thereof. Each'reverse-link com-v prisesopposed side members-13v and 14s and an interposedslotted guide "platel, the whole Ybeing bolted orotherwise suitably secured together.l The sideniember- 13 is fiXedto the respective cross-shaft andA the side member 11i is provided lat its outer side with a trunnionv 16 in aXial registerI with V`the cross-shaft and-journaled inarbearing in the associated'frame bracket 8. Y

Each reversing mechanism is provided with the .customary radius-rodl'one of which is provided at eachside of the locomotive andhas its forward end pivoted to the associated combination lever 18 'which lisfulcrumed to the valve stem cross-head of the associated engine, as well 4understood in the art. .The lower endzof the combination lever is connected by a link 19 to the assodius-rod 17 at the opposite side of the loco- 95 motive projects through and is connected in the same manner to the reverse-link 10. The movements of the radius-rods 17 lengthwise of the respective reverse-links 10 and 12 to place them in neutral or in forward orA 100V reverse running positions, are accomplished by the rocking of a pair of cross control 3 shafts 2O and 21, whichV are suitably mount-V ed inthe locomotive frame at the rear ofv the cross-shafts 6V and 7. `The shaft 20, 10,5.

which is sleeved on the shaft LZ1' is provided Y, at the right side of the locomotive with a Vforwardly projecting rocker-arm 22, which has wrist-pin connection Vwith a collar 23 rslidingly mounted on the rear end of the es- 11,0

eoy

sociated radius-rod 17. The shaft 2l at the lett side of the locomotive is provided with a forwardly projecting armV 2e, which has wrist-pin connection with a collar that is slidingly mounted on the radius-rod 17 at the left side ot the locomotivelhe crossshaft's' 2O and 21 have reverse rocking move:` ments simultaneously imparted'thereto from a control plunger or rod 26, .the movement of which is controlled in any suitable manner.' rlhis rod is connected by a link 27 to' an upwardly extending 'arm 28 on the sleeve shaft 20 and is'connected by a link 29-to a downwardly extending arm on the shaft 2l. lt is thusevident that a rearward nievement of the control rod 25 from the forward Vposition shown in Figure l will raise the rocker-arm QZand lower the rockei--arm Q4 and impart corresponding movements tor the two radius-rods 17 with respect to theY reverse linksv thereby placing'the radius rods in neutraler at desired points in reverse running positions. Y c'om'iectingthe control red 26 with the respective radius-rods soas to 'impart reverse Vwhichis carried by the shaft G and operates the reverse-link 10, while' the cross-head o t at the left side of the locomotive isV connected by a link 32 to the rocker-arm 1l, which is carried` bythe crossshaft 7 and oncrates the reverse-link 12. lt is thus evident that the cross-head Llat each side imparts accelerated travel to the engine `valve at the other Vside of the locomotive through the valve; gear which is connected and operated This manner ot q Y. Y j Vagences' by the respective Vcross-head7 and that'the lap and lead travel of each valve is received Jirom the cross-head t at thesame side of the locomotive therewith through the associated link 19 and combinationlever 18.` Y

The cross connecting ot' a valve gear at one side with the valve at the other side oit the locomotive to obtainV the accelerated travel or the valve is Vnecessary in order to impart high speed travel to the valve' when Ythe actuating cross-head is at either extreme o't its travel.V rlhis is accomplished in drive wheel driven reverse gears by setting the connection of the reverse gear with the drive wheel-90o in advanceot the main rod pin..

l wish it understood that my invention is not limited to any specific construction; ar-

rangement or form of the parts, as'it is ca.- pable lor embodiment inV numerous forms, without departing from the spirit of the claim. Y

o Having thus described my'invention, what l claim as new and desire to secure by Letters Patent, is A Y ln a locomotive. the combination with an engine operated cross-head at each side'and anY engine valve at oneside'of the locomotiveT of a cross shaft, an arm projecting downwardly from the cross-shaft at one end, link means connecting the arm and vcrosshead,` a. reverse-link carried b-y the shaft at its other end for rocking movements therewith, a floating combination lever connected to the valve and havingits lower'endin operating connection with the crosshead at the valve side of the locomotive, a radius-rod connecting the reverse-link and Ycombination lever for imparting accelerated travel to the valve from a rocking of the reverse-link, the

c radiuserod being shiftable lengthwise oi the link, and means forshifting the radius-rod.

ln testimony whereof have hereuntoV signed my name to this specification.

@Hannes J. Piemon. i 

